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{ config, lib, pkgs, ... }:
{
  programs.fish.enable = true;
  programs.tmux.enable = true;

  environment.shellAliases = {
    vim = "nvim";
  };
  environment.systemPackages = with pkgs; [
    dnsutils
    git
    gnupg
    haskellPackages.hledger
    htop
    mosh
    neovim
    nix-repl
    nox
    pass
    silver-searcher
    whois
  ];
  time.timeZone = "America/New_York";

  services = {
    openssh.passwordAuthentication = false;
  };

  nix = rec {
    useSandbox = lib.mkDefault true;
    maxJobs = lib.mkOverride 110 16;
    buildCores = lib.mkDefault 0;  # auto configure
    gc.automatic = lib.mkDefault true;
    nixPath = lib.mkBefore [
      "orbekk=https://hydra.orbekk.com/project/orbekk-projects/channel/latest/nixexprs.tar.bz2"
      "nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs"
      "nixos-config=/etc/nixos/configuration.nix"
      "/nix/var/nix/profiles/per-user/root/channels"
    ];
    trustedBinaryCaches = [
      "https://hydra.orbekk.com" "https://cache.nixos.org"
    ];
    binaryCaches = trustedBinaryCaches;
    binaryCachePublicKeys = [ "hydra.orbekk.com-1:aAKJuVqMptWoFfY9fhUADdXw5LM5IfSGjTSobuxg+Bo=" ];
  };

  boot.cleanTmpDir = true;
}